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"Last night was Donald Trump's night and today is Indiana's day," he said

Washington (CNN)Texas Sen. Ted Cruz will make "a major announcement" at 4 p.m. ET at the Pan American Pavilion in Indianapolis, he told reporters Wednesday morning.

"We'll be making a major announcement so I encourage folks to come and join us," he said in a brief media availability outside his campaign bus.

Cruz lost all five primaries held Tuesday but said he has been barnstorming Indiana in preparation for the Hoosier State's upcoming primary next week.

"Last night was Donald Trump's night and today is Indiana's day. Indiana now has the chance to speak not only for Hoosiers across the state, but for people across this country that value Midwestern common sense, that value good judgment," the Texas senator said.

Cruz would not disclose the subject of the speech but did share what he is looking for in a potential vice presidential pick.

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"The most important attribute for any running mate is that he or she should be prepared to step in and fulfill the role of president -- be commander in chief, keep this country safe. And champion jobs, freedom and security," he said.